Coding: what's new in 2004.
D039702:Current Procedural Terminology; D006801:Humans; D007344:Insurance Claim Reporting / Q000145:classification*; D007357:Insurance, Physician Services; D038801:International Classification of Diseases; D011216:Practice Management, Medical / Q000191:economics*; D011320:Primary Health Care / Q000191:economics; D014481:United States